Compress Image to 10KB

Reduce a signature or photo to under 10 KB

10 KB is one of the strictest limits on online forms. It is common for scanned signatures in exam, banking and recruitment applications, and for thumb impressions or small ID photos. A phone photo is usually 200 to 500 times bigger, so it has to be cropped, made smaller in pixels and compressed. This tool does the compression for you and reduces the dimensions only as much as needed.

How to compress an image to 10 KB

1. Crop the image tightly first, especially for a signature, with the image cropper.
2. Drop it into the box above. The target is already set to 10 KB.
3. Check the result size and pixel dimensions, then click Download.

Best results for signatures under 10 KB

• Sign with a dark pen (black or blue) on plain white paper. Thin, light lines disappear when the file is compressed.
• Photograph in daylight from straight above, so the paper looks white, not grey.
• Crop close to the ink. Empty paper still uses file size. A signature cropped to about 300 × 100 pixels fits easily under 10 KB.
• Match the required dimensions. If the form asks for a size such as 140 × 60 pixels, set it in the image resizer before compressing.

Photos under 10 KB

A face photo can fit under 10 KB if it is small, for example around 150 × 200 pixels. Use a plain background and a tight crop, because detail in the background uses up the limited space. If your form allows a little more, the 20 KB compressor gives a noticeably clearer photo.

Is the result accepted by forms?

The result is a standard JPG, which almost every portal accepts. PNG and WebP images are converted to JPG automatically, because PNG cannot be made reliably this small. Everything happens in your browser, so your signature is never uploaded anywhere.

Frequently asked questions